INFERTILE WOMEN IN THE UNITED KINGDOM who need another woman's egg to conceive typically wait years before getting matched with a donor. By contrast, there is no scarcity of donor eggs in the United States. The difference, experts say, is government regulation. In the UK, egg donors cannot get paid for their pains. In the free-market American infertility industry, women make $2,000 to $5,000 for supplying eggs. Sometimes more. Now the owner of a Los Angeles egg-donation agency is causing a stir by suggesting that American egg donors could help infertile British couples skip the long wait for eggs - by express mail and the Internet.